(19)
(11) EP 1 579 597 A1

(12)

(43) Date of publication:
28.09.2005 Bulletin 2005/39

(21) Application number: 03773006.6

(22) Date of filing: 14.11.2003
(51) International Patent Classification (IPC)7H04B 7/06, H04B 7/04
(86) International application number:
PCT/SE2003/001773
(87) International publication number:
WO 2004/057775 (08.07.2004 Gazette 2004/28)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 23.12.2002 US 328723

(71) Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
164 83 Stockholm (SE)

(72) Inventors:
  • GÖRANSSON, Bo
    S-113 48 Stockholm (SE)
  • HAGERMAN, Bo
    S-116 21 Stockholm (SE)
  • LOGOTHETIS, Andrew
    S-753 32 Uppsala (SE)

(74) Representative: Kühn, Friedrich Heinrich 
Ericsson AB Patent Unit Radio Networks Torshamnsgatan 23
164 80 Stockholm
164 80 Stockholm (SE)

   


(54) USING BEAMFORMING AND CLOSED LOOP TRANSMIT DIVERSITY IN A MULTI-BEAM ANTENNA SYSTEM